CN101035402B - Automobile instrument alarming lamp self-checking system and detection method - Google Patents
Automobile instrument alarming lamp self-checking system and detection method Download PDFInfo
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- CN101035402B CN101035402B CN2006100975878A CN200610097587A CN101035402B CN 101035402 B CN101035402 B CN 101035402B CN 2006100975878 A CN2006100975878 A CN 2006100975878A CN 200610097587 A CN200610097587 A CN 200610097587A CN 101035402 B CN101035402 B CN 101035402B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The present invention discloses a system of self-inspection and a inspecting method for auto meter warning lights, include alarm circuits connected with SCM, power supply connected with each circuit, the alarm lights of the alarm circuits, connect to SCM via detection circuits; The SCM connect with a memory; alarm lights connected with SCM via detection circuit, inspect state of the alarm lights, and send the inspecting result to SCM. Through software and combinational logic circuit for each LED warning lights for data coding state, and storage in external memory, A LED alarming lights using in detection circuit driver will no longer focus on the self-inspection information, also eliminated security risks for the alarm lights shattered. User can read the fault code value through suited diagnostic apparatus, moreover basing list of fault code found material circuitry of instrument fault. Simplify the investigation work, save time; depress working hours and technical requirements of the Vehicle maintenance.
Description
Technical field
The present invention relates to automobile instrument, specifically, relate to a kind of automobile instrument alarming lamp self-checking system and detection method.
Background technology
In the general automobiles instrument assembly, because warning circuit just just can be worked under the situation that fault takes place, in order to know the state of alarm lamp, some important alarm lamps can be lighted for 3 seconds when automotive ignition, whether were lighted the quality of judging these alarm lamps by the perusal alarm lamp by the driver in this 3 second.Along with the continuous development of automotive electronics, the quantity of alarm lamp is more and more on the automobile instrument, and the alarm lamp of lighting during the igniting self check is also more and more.Just have in the instrument that nearly 8 alarm lamps need self check when igniting.Because the alarm lamp of self check is too much, the driver is also noted that other information of vehicles when automotive ignition, be easy to ignore the state of self check alarm lamp.Thereby omit important warning message, make automobile storage in potential safety hazard.In addition, the initiation conditions of a warning circuit cisco unity malfunction has a lot of possibilities.Common instrument will determine that it is that transducer damages that trouble location needs to check layer by layer, or wire harness has problem, or the instrument board fault or the like.Such situation has brought very big workload for maintenance personal's maintenance, often will could determine trouble location by a large amount of investigation work.
Summary of the invention
Technical problem to be solved by this invention is at the deficiencies in the prior art, to provide a kind of automobile instrument alarming lamp self-checking system and detection method, to reach realization to the automatic detection of all software control alarm lamps on the instrument and the storage of failure code.
For solving the problems of the technologies described above, technical scheme of the present invention is, a kind of automobile instrument alarming lamp self-checking system, comprise the warning circuit, the power supply that is connected with each circuit that are connected with single-chip microcomputer, it is characterized in that: the alarm lamp in the described warning circuit is connected with single-chip microcomputer by testing circuit; Described single-chip microcomputer also is connected with a memory; Described testing circuit is used for the state of detection alarm lamp, and testing result is delivered to single-chip microcomputer; Described memory is used to store testing result.Instrument has the self check in 3 seconds in igniting (ON).This moment, alarm lamp can be lighted by the analog input of software.When light-emitting diode (LED) lamp carries out self check, single-chip microcomputer sends instruction, allows testing circuit detect via the state of certain sequence to each alarm lamp, the forward voltage when he passes through to measure the LED conducting, judge its whether operate as normal, and the detection feedback data.Realize the state of each alarm lamp is carried out digital coding by single-chip microcomputer and testing circuit, and be stored in plug-in memory in.
A kind of automobile instrument alarming lamp self-checking system, described alarm lamp is anodal to be connected with testing circuit.
A kind of automobile instrument alarming lamp self-checking system, described alarm lamp are light-emitting diode.
A kind of automobile instrument alarming lamp self-checking system, the model of described testing circuit are HC4051.
A kind of automobile instrument alarming lamp self-checking system, described single-chip microcomputer is provided with diagnose interface, and optionally is connected with diagnostic equipment by diagnose interface.
A kind of detection method of automobile instrument alarming lamp self-checking system is characterized in that: described detection method comprises routine step down; A) lighting up procedure was used for connecting alarm lamp in the time of setting; B) read step is used for reading successively the status data of alarm lamp; C) comparison step is used for the regime values comparison of the alarm lamp status data that will read and memory storage, judges whether within the regime values scope; If comparative result is for being then to enter forwarding step; If, then do not enter switch process; D) switch process; Be used for the alarm lamp state information is handled, convert the default corresponding failure code of each alarm lamp to; E), the storage step is used for the corresponding failure code of alarm lamp is stored memory; F), alarming step is used for the output alarm status data,, drive buzzer warning; G), forwarding step is used for the status data according to the alarm lamp of comparison step or alarming step, sends data by com bus; H), end step, the alarm lamp self check finishes, system reset.
A kind of detection method of automobile instrument alarming lamp self-checking system is characterized in that: the status data of the alarm lamp of described alarming step is alarm lamp failure code data.
Automobile instrument alarming lamp self-checking system and detection method, owing to adopt said structure, alarm lamp is connected with single-chip microcomputer by testing circuit, the state of detection alarm lamp, and testing result delivered to single-chip microcomputer.Realize the state of each LED alarm lamp is carried out digital coding by software and combinational logic circuit, and be stored in the plug-in memory.Use the testing circuit of a LED alarm lamp that the driver will no longer be concentrated on attentiveness on the self check information of instrument, also eliminated the potential safety hazard of bringing because alarm lamp damages.Simultaneously it also can help the maintenance personal not only to judge fast but also accurately in the maintenance testing process, and the user can be by the diagnostic equipment read failure code value of coupling, and concrete instrument fault circuit is found in tabulation according to failure code.Simplify investigation work, saved the time, reduced the man-hour and the specification requirement of car inspection and repair.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments;
Fig. 1 is a kind of automobile instrument alarming lamp self-checking system block diagram of the present invention;
Fig. 2 is a kind of automobile instrument alarming lamp self-checking system structural circuit of the present invention structural representation;
Fig. 3 is red light emitting diodes tube voltage drop and current curve diagram shown in Fig. 2;
Fig. 4 is white light-emitting diode tube voltage drop and current curve diagram shown in Fig. 2;
Fig. 5 is the flow chart of the detection method of a kind of automobile instrument alarming lamp self-checking system of the present invention;
In Fig. 1, Fig. 2,1, single-chip microcomputer; 2, warning circuit; 3, testing circuit; 4, memory; 5, light-emitting diode; 6, diagnostic equipment.
As shown in Figure 1 and Figure 2, a kind of automobile instrument alarming lamp self-checking system comprises that the warning circuit 2 that is connected with single-chip microcomputer 1, the power supply that is connected with each circuit, the alarm lamp positive pole in the described warning circuit 2 are connected with single-chip microcomputer 1 by testing circuit 3; Alarm lamp is light emitting diode 5, and the model of testing circuit 3 is HC4051. Described single-chip microcomputer 1 also is connected with a memory 4; Described testing circuit 3 for detection of the state of alarm lamp, and is delivered to single-chip microcomputer 1 with testing result; Described memory 4 is used for the storage testing result. The wafer that the core of light emitting diode 5 is made up of p-type semiconductor and N-shaped semiconductor has a transition zone between p-type semiconductor and N-shaped semiconductor, be called p-n junction. In the PN junction of some semi-conducting material, the minority carrier of injection and majority carrier compound tense can discharge the form of unnecessary energy with light, thereby electric energy directly is converted to luminous energy. Therefore, light emitting diode 5 communicates with common diode principle, and definite " forward conduction voltage drop " is also arranged on the presentation. Difference is because light emitting diode 5 forward voltage drops of the difference on the physical characteristic are slightly high, generally between 1.8-3.5V. We guarantee electric current on the light emitting diode 5 by joining the lamp resistance R. Referring to Fig. 3, we can see, after current value in the circuit was determined, the forward voltage drop of light emitting diode 5 was to be stabilized in a very little interval (in the 1V～1.9V). Utilize this characteristic to come the quality of light emitting diode 5 on the detector dash board. At first, instrument has the self check in 3 seconds in igniting ON. This moment, light emitting diode 5 alarm lamps can be lit by the analog input of software. When light emitting diode 5 lamps carry out self check, single-chip microcomputer 1 sends instruction to signal input part A, B, the C of testing circuit 3, allow testing circuit 3 detect via the state of certain order to each light emitting diode 5 alarm lamp, forward voltage when he passes through to measure light emitting diode 5 conducting, judge whether it works, and feedback detects data. Concrete grammar is as follows: if light emitting diode 5 is intact those constant pressure drop just should be arranged. Our testing circuit just can measure one in scope, (as shown in Figure 3, for 1.7V～1.9V take red light emitting diodes 5 as example) correct magnitude of voltage. Open circuit fault occurs if light emitting diode 5 damages, quilt is burnt, the value that then detects should be a high level (as: 12V) that exceeds monitoring range; The magnitude of voltage that short trouble then detects to occur should be an off-limits low level (as: 0.7V) if light emitting diode 5 is breakdown. Single-chip microcomputer 1 judges thus. If detect any one the road or the state of more multiple optical diode 5 undesired, then single-chip microcomputer 1 will be controlled buzzer and send warning, and status information processed, convert the corresponding failure code (DTC) of each default alarm lamp to, and store in the plug-in memory 4. Last single-chip microcomputer 1 also will send frame failure code data (CAN message) to the CAN bus and tell the information that corresponding control module alarm lamp breaks down. In maintenance process, the user can be by the diagnostic equipment 6 read failure code values that are complementary with single-chip microcomputer 1 diagnose interface, and concrete instrument fault circuit is found in tabulation according to failure code. Simplify investigation work, saved the time. Fig. 4 white light-emitting diode tube voltage drop and current curve diagram; Tube voltage drop during normal operation is different from red light emitting diodes.
As shown in Figure 5, step 21 is igniting, is used for connecting alarm lamp in the time of setting, and instrument has the self check in 3 seconds in igniting ON. This moment, light emitting diode 5 alarm lamps can be lit by the analog input of software. Step 22 is for reading, and when light emitting diode 5 lamps carried out self check, the forward voltage during by 5 conducting of measurement light emitting diode judge whether it works, and feedback detected data. Step 23 is comparison step, compares for the regime values of the alarm lamp status data that will read and memory storage, judges whether at the regime values range; If comparative result is yes, then enter forwarding step 27; Send data by com bus, if NO, then enter switch process 24; Be used for the alarm lamp status information is processed, enter step 25 after converting the corresponding failure code of each default alarm lamp to, the failure code that alarm lamp is corresponding is stored in the memory. Step 26 is used for the output alarm status data for reporting to the police, and the status data of alarm lamp is alarm lamp failure code data, and enters step 27 after driving buzzer warning, sends data to car body controller by com bus. Step 28 is ending step, and the alarm lamp self check finishes, system reset.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (7)
1. an automobile instrument alarming lamp self-checking system comprises the warning circuit that is connected with single-chip microcomputer (1)
(2), the power supply that is connected with each circuit, it is characterized in that: the alarm lamp in the described warning circuit (2) is connected with single-chip microcomputer (1) by testing circuit (3); Described single-chip microcomputer (1) also is connected with a memory (4);
Described testing circuit (3) is used for the state of detection alarm lamp, and testing result is delivered to single-chip microcomputer (1);
Described memory (4) is used to store testing result.
2. a kind of automobile instrument alarming lamp self-checking system according to claim 1 is characterized in that: described alarm lamp is anodal to be connected with testing circuit (3).
3. a kind of automobile instrument alarming lamp self-checking system according to claim 1 and 2 is characterized in that: described alarm lamp is light-emitting diode (5).
4. a kind of automobile instrument alarming lamp self-checking system according to claim 1 and 2 is characterized in that: the model of described testing circuit (3) is HC4051.
5. a kind of automobile instrument alarming lamp self-checking system according to claim 1 is characterized in that: described single-chip microcomputer (1) is provided with diagnose interface, and optionally is connected with diagnostic equipment (6) by diagnose interface.
6. the detection method of an automobile instrument alarming lamp self-checking system, it is characterized in that: described detection method comprises the following steps;
A) lighting up procedure (21) was used for connecting alarm lamp in the time of setting;
B) read step (22) is used for reading successively the status data of alarm lamp;
C) comparison step (23) is used for the regime values comparison of the alarm lamp status data that will read and memory (4) storage, judges whether within the regime values scope; If comparative result is for being then to enter forwarding step (27); If, then do not enter switch process (24);
D) switch process (24) is used for the alarm lamp state information is handled, and converts the default corresponding failure code of each alarm lamp to;
E) storage step (25) is used for the corresponding failure code of alarm lamp is stored memory;
F) alarming step (26) is used for the output alarm status data, drives buzzer warning;
G) forwarding step (27) is used for the status data according to the alarm lamp of comparison step (23) or alarming step (26), sends data by com bus;
H) end step (28), the alarm lamp self check finishes, system reset.
7. the detection method of a kind of automobile instrument alarming lamp self-checking system according to claim 6, it is characterized in that: the status data of the alarm lamp of described alarming step (26) is alarm lamp failure code data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100975878A CN101035402B (en) | 2006-11-09 | 2006-11-09 | Automobile instrument alarming lamp self-checking system and detection method |
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| CN2006100975878A CN101035402B (en) | 2006-11-09 | 2006-11-09 | Automobile instrument alarming lamp self-checking system and detection method |
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| CN101035402A CN101035402A (en) | 2007-09-12 |
| CN101035402B true CN101035402B (en) | 2010-09-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439672A (en) * | 2013-08-27 | 2013-12-11 | 上海德科电子仪表有限公司 | Circuit and method for detecting faults of alarm lamp of motormeter |
| CN104427729B (en) * | 2013-08-29 | 2017-06-16 | 上海德科电子仪表有限公司 | The fault handling method of automobile instrument alarming lamp |
| CN105657924A (en) * | 2014-11-12 | 2016-06-08 | 施耐德电器工业公司 | Signal device and self detection method for signal device |
| CN105573209A (en) * | 2015-12-30 | 2016-05-11 | 惠州市德赛西威汽车电子股份有限公司 | Function module monitoring and resetting method in vehicle electronic system |
| CN107690678A (en) * | 2017-08-28 | 2018-02-13 | 深圳市锐明技术股份有限公司 | A kind of security device and its self-inspection alarm system |
| CN112078515B (en) * | 2020-08-05 | 2022-03-04 | 东风电驱动系统有限公司 | TFT screen alarm lamp detection method and system |
| CN112078364B (en) * | 2020-08-05 | 2022-07-01 | 东风电驱动系统有限公司 | UART-based TFT screen alarm lamp self-checking method and system |
| CN114816168A (en) * | 2022-06-23 | 2022-07-29 | 武汉海微科技有限公司 | Icon display circuit, icon display method and device and vehicle |
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| CN2487601Y (en) * | 2001-07-05 | 2002-04-24 | 陈令华 | Fault sounding alarm for signal lamp of automobile |
| CN2554049Y (en) * | 2002-05-30 | 2003-06-04 | 中国重型汽车集团有限公司 | Self-checking device of vehicle signal indicator light |
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|---|---|---|---|---|
| CN2073837U (en) * | 1990-09-27 | 1991-03-27 | 王济 | Signal lamp alarm for intelligent automobile |
| CN2142414Y (en) * | 1992-10-12 | 1993-09-22 | 刘海军 | Fault alarm for vehicle indicating lamp |
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Non-Patent Citations (1)
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| JP平1-288778A 1989.11.21 |
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| CN101035402A (en) | 2007-09-12 |
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Assignee: Hongjing Electronic (Wuhu) Co., Ltd. Assignor: ATECH Automotive (Wuhu) Co., Ltd. Contract record no.: 2011340000109 Denomination of invention: Automobile instrument alarming lamp self-checking system and detection method Granted publication date: 20100901 License type: Exclusive License Open date: 20070912 Record date: 20110708 |
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Owner name: BOSCH AUTOMOBILE MULTIMEDIA (WUHU) CO., LTD. Free format text: FORMER OWNER: EITAIKE AUTOCAR ELECTRONICS (WUHU) CO., LTD. Effective date: 20131128 |
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Effective date of registration: 20131128 Address after: 241000 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 206 North Road Patentee after: BOSCH multimedia (Wuhu) Co., Ltd. Address before: 241000 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 206 North Road Patentee before: ATECH Automotive (Wuhu) Co., Ltd. |
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Address after: 241000 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 206 North Road Patentee after: Bertek automotive electronics (Wuhu) Co., Ltd Address before: 241000 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 206 North Road Patentee before: Bosch Car Multimedia (Wuhu) Co.,Ltd. |
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